Allegro Microsystems is trading at $32.81 (-4.93%) amid semiconductor weakness and broader risk-off pressure on technology shares. - Premarket coverage linked chip weakness to concerns about Lam Research’s outlook, including supply constraints and lower China revenue. - AI-spending concerns and rising oil also weighed on markets. - No new company-specific catalyst was found for Allegro Microsystems on October 22; its latest company announcement was October 20.